Java第七次作业

interface Pet{    
        public String getName() ;
    public String getColor() ;
    public int getAge() ;
}
class Cat implements Pet{    
    private String name ;    
    private String color ;    
    private int age ;        
    public Cat(String name,String color,int age){
        this.setName(name) ;
        this.setColor(color) ;
        this.setAge(age) ;
    }
    public void setName(String name){
        this.name = name ;
    }
    public void setColor(String color){
        this.color = color;
    }
    public void setAge(int age){
        this.age = age ;
    }
    public String getName(){
        return this.name ;
    }
    public String getColor(){
        return this.color ;
    }
    public int getAge(){
        return this.age ;
    }
};
class Dog implements Pet{    
    private String name ;    
    private String color ;    
    private int age ;        
    public Dog(String name,String color,int age){
        this.setName(name) ;
        this.setColor(color) ;
        this.setAge(age) ;
    }
    public void setName(String name){
        this.name = name ;
    }
    public void setColor(String color){
        this.color = color;
    }
    public void setAge(int age){
        this.age = age ;
    }
    public String getName(){
        return this.name ;
    }
    public String getColor(){
        return this.color ;
    }
    public int getAge(){
        return this.age ;
    }
};
class PetShop{    
    private Pet[] pets ;    
    private int foot ;
    public PetShop(int len){
        if(len>0){
            this.pets = new Pet[len] ;    
        }else{
            this.pets = new Pet[1] ;    
        }
    }
    public boolean add(Pet pet){    
        if(this.foot<this.pets.length){
            this.pets[this.foot] = pet ;    
            this.foot ++ ;
            return true ;
        }else{
            return false ;
        }
    }
    public Pet[] search(String keyWord){
        Pet p[] = null ;
        int count = 0 ;    
        for(int i=0;i<this.pets.length;i++){
            if(this.pets[i]!=null){        
                if(this.pets[i].getName().indexOf(keyWord)!=-1
                    ||this.pets[i].getColor().indexOf(keyWord)!=-1){
                    count++ ;    
                }
            }
        }
        p = new Pet[count] ;    
        int f = 0 ;    
        for(int i=0;i<this.pets.length;i++){
            if(this.pets[i]!=null){        
                if(this.pets[i].getName().indexOf(keyWord)!=-1
                    ||this.pets[i].getColor().indexOf(keyWord)!=-1){
                    p[f] = this.pets[i] ;
                    f++ ;
                }
            }
        }
        return p ;

    }
};
public class HomeworkDemo{
    public static void main(String args[]){
        PetShop ps = new PetShop(5) ;    
        ps.add(new Cat("英短","灰色的",5));    
        ps.add(new Cat("布偶猫","白色的",2));    
        ps.add(new Cat("花猫","花色的",6));    
        ps.add(new Dog("哈士奇犬","黑白色的",2));    
        ps.add(new Dog("金毛犬","金色的",1));    
        print(ps.search("犬"));
    }
    public static void print(Pet p[]){
        for(int i=0;i<p.length;i++){
        if(p[i]!=null){
            System.out.println(p[i].getName()+","+p[i].getColor()+","+p[i].getAge());
            }
        }
    }
};